John blacklock



J. BLACK-LOCK. Circular Knitting! Machine.

No. 236,698. Patented Jan. 18,1881.

ILPEERS. PHOTO LTMOGRAFNER. WASHXNGTON D C UNITED STATES -llrrrce PATNT JOHN BLACKLOCK, OF TORONTO, ONTARIO, CANADA, ASSIGNOR TO THE UNIVERSAL KNITTING MACHINE COMPANY, OF SAME PLACE.

CIRCULAR-KNITTING MACHINE.

SPECIFICATION forming part of Letters Patent No. 236,698, dated January 18, 1881.

Application filed September 9, 1878. Patented in Canada August 29, 1878, for five years; extended December 6, 1880, for ten years.

To all 'whom it may concern:

Beit known that I, JOHN BLACKLOGK, of the city of Toronto, in the county of York, in the Province of Ontario, Canada, manuf'acturer, have invented certain new and useful Improvements in Circular-Knitting Machines, (patented to me in Canada August 29, 1878, No. 9,129 and I do hereby declare that the following is a full, clear, and exact description of the same.

My invention relates to improvements upon cylindrical knitting-machines; and it consists in the construction and arrangement of parts, as hereinafter more fully set forth, and then pointed out in the claims.

In the accompanying drawings, Figure 1 is a cross-section, and Fig. 2 a plan, of a machine embodying my improvements. Figs. 8, 4, and 5 are details.

A is the frame of machine, provided with the usual clamping-bracket A for setting up.

B is the vertical needle-cylinder, and C the combined cam-cylinder and cog-ring, operated by a crank and toothed wheel, as usual.

D is the yarn-feeder, attached directly to the combined cam-cylinder and cog-ring, directly over the cam, by which arrangement the feed is always in position to work instantly backward or forward.

E is the vertical knitting-cylinder cam, the line of whose inflection is elevated in the center at e, and is depressed on each side of the center at e e. The endsl of the cam are formed by adjustable wing-pieces F F. These wings are pivoted at one end, and are connected, by stud-pins e2, with the ends of the pivoted levers G, which levers are, in turn, connected to a nut, h, on the adjusting-screw H, in such manner that the position ot' the wings, as a part of the cam, may be varied, as desired, by turning the screw up or down. The object of this arrange ment is to enable the operator to lengthen or shorten the stitch at pleasure, or, in other words, to increase or decrease the tension of the stitch, so as to produce tightly or loosely knitted work. The wings at each end permit the machine to be worked backward or forward with equal facility.

I is a bracket-arm, attached to the cam-cylinder by a socket and set-screw connection. The upper end of this bracket terminates at a point immediately above the center of the vertical knitting-cylinder, and has attached to it, by the screwed pin I', the cone-shaped ribbing dia-l or cylinder J. The axes of the ribbing and vertical cylinders correspond, and the diameter of the ribbing-cylinder, at the lower edge, corresponds with the circle of the inner side of vertical needles, sufficient space being left, of course, for the work to pass through. The rib hing-needle cylinder is held stationary by lugs j, engaging with the lug b on the cylinder B.

K is the cam-cylinder ot' the ribbing attachment. This cam-cylinder is securely attached to the pin I', and with it turns as the bracket I revolves. The cam-cylinder K overlies the ribbing-cylinder, and is provided with a cam, L L, by the contact of the needles, with which they are given an outward and downward motion on the one stroke and an upward and inward motion on the return stroke. The position of the cams on the ribbing attachment and on the vertical cylinder correspond, so that the needles in working intersect. The parts of the ribbing attachment are so proportioned that the needles which operate in the vertical cyl-v inder are used in the ribbing-cylinder-that is, they are transferable from one cylinder to the other. The needles may thus be changed from plain work to ribbing work, and inversely without dropping the stitches.

M is a fender attached to the yarn-feeder. The object of this fender is to keep open the latches of the ribbing-needles while they are taking their yarn; and to this end the fender is provided with a knife-edge, and so placed that it engages with the latches of the needles and holds them open for the required length ot' time. It will be seen that this fender is double-pointed and that it is curved in crosssection, as seen in Fig. 1, by which means it operates on both sets of needles, and the machine can be run in either direction with equal facility.

The ribbing-cani is provided with a switch, N, by means of which the ribbing-needles can be thrown in and out ot' action. To throw the ribbing-needles out of action the switch N is depressed by the lever N. This movement permits the needles to pass behind the cam, which revolves without imparting any motion to them. The object of this arrangementis to IOO enable the operator to produce what is called a Welt 7 at the top of a stocking or other ribbed Work. So soon as sufficient Weltis formed the ribbing-needles are thrown into action again.

I claim as my inventionl. The combination, with the vertical knitting-cylinder B, cam-cylinder C, arm I, coneshaped ribbing-dial J, and overlying ca1n-cyl inder K, ofthe double-pointed fender M. curved in cross-section, substantially as described, and for the purpose specitied.

2. The vertical knitting-cylinder cam E, having its line of inflection elevated in the center at e and depressed at each side of the center at e', combined with the adjustable and pivoted wing-pieces F, stud-pins e?, pivoted levers G, and adjusting-screw H, substantially as set forth, whereby, by the changing,` of the position of the Wing-pieces F, the operator may increase or decrease the tension of the stitch for the production ot' tightly or loosely knitted 

